__________________
I had a dream: Let's connect our thoughts together, than we have a mission, let's connect our feelings together, than we have a mood, let's connect our dreams together, than we have a vision and let's connect our mission, our mood and our vision together than we have a perfect life.

Going by Joachim with Alexandra and Marie's previous choices it seems there may be two things we can be certain of IMO:

1. There will be 5 godparents in all, 3 of the same sex as the child and two of the opposite gender
2. Unless someone new joins the Danish/Greek/Berleburg family (like Mary after Felix's birth but before bette Henrik's), there probably won't be any royal godparents. So perhaps Tatiana may be a godmother but as Nikolaos isn't one himself, that seems unlikely.